Might be related to bug 986375 and 990565 -- tried the latest 3.10.x (F19) and 3.11.x (F20) kernels from Koji and the problem persists, while the last 3.9.x release works.
Troubling thing is, 990565 is on a system with a Radeon card and this is on Intel

Not sure this is a problem with Intel's X driver - per https://aur.archlinux.org/packages/linux-mainline-dellxps/ (mentioned in the Arch forum post) this is definitely an issue with their DRI driver.
Per the suggestion in the comments on that AUR package, disabling Secure Boot and enabling the Legacy Option ROM works as a temporary workaround.
At least it looks like the mainstream bug report has a solution in the works, so hopefully 3.12 will carry the fix (but will it be available for Fedora 19 users?)

*********** MASS BUG UPDATE **************
We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 19 kernel bugs.
Fedora 19 has now been rebased to 3.12.6-200.fc19. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.
If you have moved on to Fedora 20, and are still experiencing this issue, please change the version to Fedora 20.
If you experience different issues, please open a new bug report for those.

*********** MASS BUG UPDATE **************
This bug has been in a needinfo state for more than 1 month and is being closed with insufficient data due to inactivity. If this is still an issue with Fedora 19, please feel free to reopen the bug and provide the additional information requested.

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